[streaming] Re: Resolution Pc Vs Tv

Psycho Ph degreane at yahoo.com
Tue Oct 21 19:12:37 CEST 2003


Correct me if am wrong ........

                         ( )             ( )
/----\                  ((|))           ((|))    
|    |---|<      >|-------|               |---{client}
\----/
VLC         IGMP        wireless          AP
server      Switch          AP

If I broadcast as described in the above schema. and I
have 5 programs yet only the client requested one out
of these five then the WIRELESS AP will only be filled
with that stream untill the client decides to leave
that IGMP request and attend to another one then it
would take like some minutes so that the switch to
turn off the previously requested one the first one
then it would be free for the second one to pass
freely .....??????????


Do you know any reliable wireless Bridges Or access
points to be able to function good with My
schema.?????

Best Regards
F.B.

 
--- John Anderson <john at gocoretec.com> wrote:
> > As I said before Am going to use the Amino 103
> set-top
> > box which supports IGMP Multicast. but My Question
> is
> > I don't know if the configuration how-to comes
> with
> > the set-top box but in all cases I will be looking
> for
> > igmp udp multicast.....
> 
> This isn't a question.
> 
> > second thing on the server side my case am using
> VLC
> > is there any special configuration to apply in
> order
> > to support IGMP udp Multicast or just UDP
> Multicast
> > with sap enabled.?
> 
> There is no special IGMP support requirements for
> the server side.  Only the
> destination client must support IGMP.
> 
> > Third thing can I assume that the traffic with
> such a
> > switch before attending the wireless Bridge would
> be
> > less than the normal multicast traffic ?????
> 
> The traffic to the wireless bridge will be the sum
> of all multicast
> receivers on that bridge.
> 
> Also you need to be aware that IGMP does not
> immediately turn off a
> multicast stream as soon as the client leaves the
> multicast group.  So if
> the receiving station is cycling through the
> available multicasts (channel
> surfing), then a significant amount of traffic can
> accumulate on that leg.
> There are switches with an immediate leave option,
> but normally there is a
> delay ( of several minutes sometimes ) before a
> stream is actually turned
> off by the IGMP switch.
> 
> -- 
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